Question

3) Two ice skaters start out motionless in the center of
theice rank. they then push off each other. The man (mass=70kg)
movesto the right with a speed of 4.5 m/s. The woman (mass=50kg)
wasmoving with a speed of 6.3 m/s to the left.

a)What has happened to the total
kineticenergy of the system during their push-off (in J)?

b) Where did this kinetic energy come
from(i.e. what kind of energy was converted into kinetic energy
duringthe push-off?)